Update with math.Hypot()

displace.go

@@ -12,7 +12,7 @@ type Displace struct {
 	Indep           bool
 }
 
-// NewDisplace creates a new Dispalce instance using the same source for both x and y displacements.
+// NewDisplace creates a new Displace instance using the same transform for both x and y displacements.
 func NewDisplace(in, dx, dy Field, scale float64) *Displace {
 	xfm := graphics2d.NewAff3()
 	xfm.Scale(scale, scale)

gradient.go

@@ -25,7 +25,7 @@ func NewRadialGradient(wf Wave) *RadialGradient {
 }
 
 func (g *RadialGradient) Eval2(x, y float64) float64 {
-	v := math.Sqrt(x*x + y*y)
+	v := math.Hypot(x, y)
 	return g.WF.Eval(v)
 }
 

utils.go

@@ -12,7 +12,7 @@ import (
 func NewLinearGray16(w, h int, p1, p2 []float64, wf *NonLinear, mirror, once bool) *TextureGray16 {
 	dx, dy := p2[0]-p1[0], p2[1]-p1[1]
 	th := math.Atan2(dy, dx)
-	lambda := math.Sqrt(dx*dx + dy*dy)
+	lambda := math.Hypot(dx, dy)
 
 	if wf == nil {
 		wf = NewNLLinear()
@@ -54,16 +54,16 @@ func NewConicGray16(w, h int, c []float64, th float64, wf *NonLinear) *TextureGr
 	return NewTextureGray16(w, h, cf, 0, 0, 1, 1)
 }
 
-// Tinting wrappers around the grayscale gradients
+// Colorizer wrappers around the grayscale gradients
 
-func NewLinearRGBA(w, h int, p1, p2 []float64, c1, c2 color.Color, wf *NonLinear, mirror, once bool) *image.Tinter {
-	return image.NewTinter(NewLinearGray16(w, h, p1, p2, wf, mirror, once), c1, c2)
+func NewLinearRGBA(w, h int, p1, p2 []float64, c1, c2 color.Color, wf *NonLinear, mirror, once bool) *image.Colorizer {
+	return image.NewColorizer(NewLinearGray16(w, h, p1, p2, wf, mirror, once), c1, c2, nil, nil, false)
 }
 
-func NewRadialRGBA(w, h int, c []float64, r float64, c1, c2 color.Color, wf *NonLinear, mirror, once bool) *image.Tinter {
-	return image.NewTinter(NewRadialGray16(w, h, c, r, wf, mirror, once), c1, c2)
+func NewRadialRGBA(w, h int, c []float64, r float64, c1, c2 color.Color, wf *NonLinear, mirror, once bool) *image.Colorizer {
+	return image.NewColorizer(NewRadialGray16(w, h, c, r, wf, mirror, once), c1, c2, nil, nil, false)
 }
 
-func NewConicRGBA(w, h int, c []float64, th float64, c1, c2 color.Color, wf *NonLinear) *image.Tinter {
-	return image.NewTinter(NewConicGray16(w, h, c, th, wf), c1, c2)
+func NewConicRGBA(w, h int, c []float64, th float64, c1, c2 color.Color, wf *NonLinear) *image.Colorizer {
+	return image.NewColorizer(NewConicGray16(w, h, c, th, wf), c1, c2, nil, nil, false)
 }